I’m using your tileset, and trying to reproduce the problem you’re seeing. I set up my material layer like this:
And I get a view like this:
Which I think is behaving correctly. The roofs all have an estimated height of 0.0, so they’re red, while the walls have various values greater than 0.2 so they’re black.
I didn’t change any of the metadata component values from their defaults after the Auto Fill. The estimated height property looks like this:
If that all seems right so far, but it isn’t working for you, maybe it’s worth checking out how you set up your material. Mine looks like this:
It’s very important that the top material layer be named exactly FeaturesMetadata. I don’t think that would cause the seemingly random values that you’re seeing, but it’s worth checking.